Maqola

Measurement of the differential $$\hbox {t}\overline{\hbox {t}}$$ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks

A. TumasyanYerevan Physics Institute, Yerevan, ArmeniaW. AdamInstitut für Hochenergiephysik, Vienna, AustriaJanik Walter AndrejkovicInstitut für Hochenergiephysik, Vienna, AustriaT. BergauerInstitut für Hochenergiephysik, Vienna, AustriaS. ChatterjeeInstitut für Hochenergiephysik, Vienna, AustriaK. DamanakisInstitut für Hochenergiephysik, Vienna, AustriaM. DragicevicInstitut für Hochenergiephysik, Vienna, AustriaA. Escalante Del ValleInstitut für Hochenergiephysik, Vienna, AustriaPriya Sajid HussainInstitut für Hochenergiephysik, Vienna, AustriaM. JeitlerTU Wien, Vienna, AustriaNatascha KrammerInstitut für Hochenergiephysik, Vienna, AustriaL. LechnerInstitut für Hochenergiephysik, Vienna, AustriaD. LikoInstitut für Hochenergiephysik, Vienna, AustriaI. MikulecInstitut für Hochenergiephysik, Vienna, AustriaP. PaulitschInstitut für Hochenergiephysik, Vienna, AustriaF. M. PittersInstitut für Hochenergiephysik, Vienna, AustriaJ. SchieckInstitut für Hochenergiephysik, Vienna, AustriaR. SchöfbeckInstitut für Hochenergiephysik, Vienna, AustriaD. SchwarzInstitut für Hochenergiephysik, Vienna, AustriaS. TemplInstitut für Hochenergiephysik, Vienna, AustriaW. WaltenbergerInstitut für Hochenergiephysik, Vienna, AustriaC.-E. WulzInstitut für Hochenergiephysik, Vienna, AustriaM. R. DarwishInstitute of Basic and Applied Sciences, Faculty of Engineering, Arab Academy for Science, Technology and Maritime Transport, Alexandria, EgyptX. JanssenUniversiteit Antwerpen, Antwerpen, BelgiumT. KelloUniversiteit Antwerpen, Antwerpen, BelgiumHaifa Rejeb SfarUniversiteit Antwerpen, Antwerpen, BelgiumP. Van MechelenUniversiteit Antwerpen, Antwerpen, BelgiumE. S. BolsVrije Universiteit Brussel, Brussel, BelgiumJ. D’HondtVrije Universiteit Brussel, Brussel, BelgiumA. De MoorVrije Universiteit Brussel, Brussel, BelgiumM. DelcourtVrije Universiteit Brussel, Brussel, BelgiumH. El FahamVrije Universiteit Brussel, Brussel, BelgiumS. LowetteVrije Universiteit Brussel, Brussel, BelgiumS. MoortgatVrije Universiteit Brussel, Brussel, BelgiumA. MortonVrije Universiteit Brussel, Brussel, BelgiumD. MüllerVrije Universiteit Brussel, Brussel, BelgiumA. R. SahasransuVrije Universiteit Brussel, Brussel, BelgiumS. TavernierVrije Universiteit Brussel, Brussel, BelgiumW. Van DoninckVrije Universiteit Brussel, Brussel, BelgiumD. VanneromVrije Universiteit Brussel, Brussel, BelgiumB. ClerbauxUniversité Libre de Bruxelles, Bruxelles, BelgiumG. De LentdeckerUniversité Libre de Bruxelles, Bruxelles, BelgiumL. FavartUniversité Libre de Bruxelles, Bruxelles, BelgiumD. HohovUniversité Libre de Bruxelles, Bruxelles, BelgiumJ. JaramilloUniversité Libre de Bruxelles, Bruxelles, BelgiumK. LeeKorea University, Seoul, KoreaM. MahdavikhorramiUniversité Libre de Bruxelles, Bruxelles, BelgiumI. MakarenkoUniversité Libre de Bruxelles, Bruxelles, BelgiumA. MalaraUniversité Libre de Bruxelles, Bruxelles, BelgiumS. ParedesUniversité Libre de Bruxelles, Bruxelles, BelgiumL. PétréUniversité Libre de Bruxelles, Bruxelles, BelgiumN. PostiauUniversité Libre de Bruxelles, Bruxelles, BelgiumLaurent ThomasUniversité Libre de Bruxelles, Bruxelles, BelgiumM. Vanden BemdenUniversité Libre de Bruxelles, Bruxelles, BelgiumC. Vander VeldeUniversité Libre de Bruxelles, Bruxelles, BelgiumP. VanlaerUniversité Libre de Bruxelles, Bruxelles, BelgiumD. DoburGhent University, Ghent, BelgiumJ. KnolleGhent University, Ghent, BelgiumLuka LambrechtGhent University, Ghent, BelgiumG. MestdachGhent University, Ghent, BelgiumM. NiedzielaGhent University, Ghent, BelgiumCésar RendónGhent University, Ghent, BelgiumC. RoskasGhent University, Ghent, BelgiumA. SamalanGhent University, Ghent, BelgiumK. SkovpenGhent University, Ghent, BelgiumM. TytgatGhent University, Ghent, BelgiumN. Van Den BosscheGhent University, Ghent, BelgiumB. VermassenGhent University, Ghent, BelgiumLiam WezenbeekGhent University, Ghent, BelgiumA. BeneckeUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumG. BrunoUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumF. BuryUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumC. CaputoUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumP. DavidUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumC. DelaereUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumI. S. DonertasUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumA. GiammancoUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumK. JaffelUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumSa. JainUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumV. Lemaı̂treUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumK. MondalUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumA. TaliercioUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumT. T. TranUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumP. VischiaUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumS. WertzUniversité Catholique de Louvain, Louvain-la-Neuve, BelgiumG. A. AlvesCentro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, BrazilE. CoelhoCentro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, BrazilC. HenselCentro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, BrazilA. MoraesCentro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, BrazilP. Rebello TelesCentro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, BrazilW. L. Aldá JúniorUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilM. Alves Gallo PereiraUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilM. Barroso Ferreira FilhoUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilH. Brandao MalbouissonUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilW. CarvalhoUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilJ. ChinellatoUniversidade Estadual de Campinas, Campinas, BrazilE. M. Da CostaUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilG. G. Da SilveiraFederal University of Rio Grande do Sul, Porto Alegre, BrazilD. De Jesus DamiãoUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, BrazilV. Dos Santos SousaUniversidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil

The European Physical Journal Cjournal2023en

ABI

Annotatsiya

Abstract A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton + jets channel of top quark pair production ( $$\hbox {t}\overline{\hbox {t}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>t</mml:mtext> <mml:mover> <mml:mtext>t</mml:mtext> <mml:mo>¯</mml:mo> </mml:mover> </mml:mrow> </mml:math> ) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400 $$\,\text {Ge}\hspace{-.08em}\text {V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Ge</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> . The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138 $$\,\text {fb}^{-1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:msup> <mml:mtext>fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> . The differential $$\hbox {t}\overline{\hbox {t}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>t</mml:mtext> <mml:mover> <mml:mtext>t</mml:mtext> <mml:mo>¯</mml:mo> </mml:mover> </mml:mrow> </mml:math> production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modelling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of $$173.06 \pm 0.84\,\text {Ge}\hspace{-.08em}\text {V} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>173.06</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.84</mml:mn> <mml:mspace/> <mml:mtext>Ge</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> .

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Mavzular

Particle physics theoretical and experimental studies High-Energy Particle Collisions Research Particle Detector Development and Performance

Identifikatorlar

DOI: 10.1140/epjc/s10052-023-11587-8

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